I have a Tornado of late 90's build. She has a hard life but is loved and all in all her tubes are in okay condition. They are PU/PVC rather than Hypalon and recently she has been going flat.
I have replaced two valves which I believe may have been the cause. No difference. I have checked for air leaks around them but no signs. I have pumped it up hard and sprayed water and sqoosh and there are no obvious signs of leakage. Has anyone ever experienced this before?
If I pump her up hard in the morning she is needing pumped up again by 3pm or so, so I would expect this air leak to be obvious.